Beating yourself up wasn't actually a simple matter.
Practicing the Nine Forces Shocking Dragon required immense force for the best effect, but at the same time, he couldn't destroy his own body, the very vessel containing it.
If, during the process of storing power, the force was too great and damaged his body—for instance, by suddenly punching a hole through his stomach—then that power would dissipate.
Ultimately, all his effort would be wasted, and he would have to start over from scratch.
But to ensure the best effect each time without destroying his body required constant testing of his limits.
As his body grew stronger through Body Refining, the amount of force required would also increase.
Once this Body Refining Technique was mastered, the stored power would be unleashed all at once in battle, after which he would need to store it all over again.
In reality, this Body Refining Technique had some significant limitations.
